Meta name tag in the header. Rich text isn't working for

Hello. I need to add a meta name tag in the header of my site. I know that I can add a rich text box and include HTML. However, when I view the source of the page, I do not see it. I’ve tried using the WebEmbed - but that didn’t do the trick. I’ve also tried to explore the experimental column - but I wasn’t quite sure how to make it work. Everything I tried - the actual meta name is not in HTML when the view the page source. Any ideas?

I doubt this is possible.